Posted January 16, 200718 yr I have a 1979 yamaha xs 400f that starts fine but while idling it shoots oil out the breater tube. also when i check the oil level it says that it is full, but when I open the drain plug very little oil comes out. any help will be appreciated.
January 16, 200718 yr Moderator I have a 1979 yamaha xs 400f that starts fine but while idling it shoots oil out the breater tube. also when i check the oil level it says that it is full, but when I open the drain plug very little oil comes out. any help will be appreciated. could be crankcase pressure building up due to worn bores. how does the oil come out of the breather tube, is it disconnected from the induction? BTW did you post this on another forum a while ago, as this sounds familliar?
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